- Extremely precise, extremely rugged, extremely practical – with visual alarm and backlit display
- Measures pressure and calculates the evaporation temperature of H2O automatically
- Measurement data monitoring via testo Smart Probes App
- Measurement data dispatch via testo Smart Probes App
The testo 552 is a high-precision digital vacuum gauge designed to provide you with absolutely reliable readings. It has all the measuring functions you need for evacuating refrigerant systems and heat pumps and is built to last and tough enough to take the odd knock.
Measuring via your Smart phone
Via a Bluetooth interface, the testo 552 connects with the testo Smart Probes App on your smartphone or tablet. This allows you to monitor the absolute pressure reached during the evacuation conveniently and wirelessly. In addition to this, the measurement results can be quickly documented in the App and sent by e-mail easily.
This vacuum gauge provides values of the highest possible precision. But that’s not enough. Because it is not just the low pressures, but also above all the small details that make the evacuation of refrigeration systems or heat pumps smooth in the first place. And these are what will make you happy, at the latest when you start the vacuum measurement.
It is IP42 rated (water resistant and dirt proof), means that it is virtually impervious to moisture and dirt.
| Absolute pressure | |
| Measuring range | 0 to 26.66 mbar / |
| 0 to 20000 micron | |
| Accuracy | ±(10 micron + 10 % of mv) (100 to 1000 micron) |
| Resolution | 1 micron (0 to 1000 micron) / |
| 10 micron (1000 to 2000 micron) / | |
| 100 micron (2000 to 5000 micron) / | |
| Overload | absolute: 6.0 bar / 87 psi |
| (relative: 5.0 bar / 72 psi) | |
| General technical data | |
| Weight | 500 g |
| Dimensions | 160 x 110 x 50 mm |
| Operating temperature | -10 to +50 °C |
| Protection class | IP42 |
| System requirements | requires iOS 8.3 or newer; requires Android 4.3 or newer; requires mobile end device with Bluetooth 4.0 |
| Product colour | black/orange |
| Battery type | 2 AA |
| Battery life | 50 hrs (without Bluetooth/backlighting) |
| Connection | 2 x 7/16“ UNF |
| Interface | Bluetooth® 4.0 wireless technology |
| Parameter | mbar; micron; mmHg; Torr; inHg; inH20; hPa; Pa |
| Measuring rate | 0.5 s |
| Storage temperature | -20 to +50 °C |